What is the idea behind vim?

Vim is optimized for repetition.Act,repeat, reverse

vim不是一大堆插件以及一大堆的命令。很多人觉得vim难以上手也是因为不了解vim的精髓。Dot command 是vim中处理重复操作基本命令.需要注意的是"."重复上一组修改而不是跳转的动作

举个例子:

Keystrokes	Buffer Contents
{start}	...We're waiting for content before the site can go live If you are content with this, let's go ahead with it We'll launch as soon as we have the content
*	...We're waiting for content before the site can go live.If you are content with this, let's go ahead with it.We'll launch as soon as we have the content...
cwcopy	...We're waiting for content before the site can go live.If you are content with this, let's go ahead with it.We'll launch as soon as we have the copy...
n	...We're waiting for content before the site can go live.If you are content with this, let's go ahead with it.We'll launch as soon as we have the copy...
.	...We're waiting for copy before the site can go live.If you are content with this, let's go ahead with it.We'll launch as soon as we have the copy...

Compose Repeatable Changes

Suppose our cursor is positioned on the "h", and we want to delete the word "nigh"

The end is nigh

Method 1:

Keystrokes	Buffer Contents
{start}	The end is nigh
db	The end is h
x	The end is
"." repeat "x"

Method 2:

Keystrokes	Buffer Contents
{start}	The end is nigh
b	The end is nigh
dw	The end is
"." repeat "dw"

Method 3:

Keystrokes	Buffer Contents
{start}	The end is nigh
daw	The end is
"." repeat "daw"

Method 3 is the best one.

Register + Operator + Motion = Action

d{motion} :

• dl : delete a single character
• daw: delete a complete word
• dap : delete a paragraphy

d,c,y 都属于operator, l,aw,ap属于motion，说明operator作用的对象。vim基本的语法就是operator + motion.

• "ayy: yank current line to register a
• "ayiw: yank current inner work to register a

Operator:

• a : around 删除word,包括周边空格
• i : inner 删除字,但是不包括周围空格

Register

The Unnamed Register ("")

默认寄存器就是"", 所以dd相当于""dd

The Yank Register : "0

yank register. 顾名思义就是在yank使会更新的register. 这个的好处就是不会被dd,diw这些命令覆盖了之前yank的内容。

The black hole register("_)

A place from which nothing returns.

More Registers:

• "% : Name of the current file
• "# : Name of the alternate file
• ". : Last inserted text
• ": : Last Ex command
• "/ : Last search pattern -- it can be set explicitly using :let

Commands

• reg : show all register content